From inside (document excerpt):
24ABR3 BasetSeries 13 Air Conditioner Sizes 18 to 60 1 1/2 to 5 Nominal Tons Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 13 SEER/11 EER (Nominal) S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 76 dBA S As low as 73 dBA with optional accessory sound hood Comfort S System supports Thermidistatt or standard thermostat controls Reliability S Front–seating service valves S Scroll compressor S Internal pressure relief valve S Internal thermal overload S Filter drier S Balanced refrigeration system for maximum reliability Durability WeatherArmort protection package: A05341 S Solid, Durable sheet metal construction S Wire coil guard S Baked–on, complete coverage, powder paint Applications S Long–line — up to 250 feet total equivalent length, up to 200 feet condenser above evaporator, or up to 80 ft.
evaporator above condenser (See Longline Guide for more information.) S Low ambient (down to –20_F) with accessory kit Warranty Single Phase 5 year limited parts warranty Three Phase S 5 year limited compressor warranty 5 year limited compressor warranty 1 year limited parts warranty MODEL NUMBER NOMENCLATURE 1 N 2 2 N 4 3 A A Product Family A=RES AC 4 A B Tier B=Base 5 A/N R Major Series R=R 22 6 N 3 SEER 3=13 SEER 7 N 3 8 N 6 9 A/N A Variations A=Standard G=Dense Coil Guard 10 A/N 0 Open 0=Not Defined 11 A/N 0 Open 0=Not Defined 12 N 3 Voltage 3=208/230 1 5=208/230 3 6=460/3 13 N 0 Series 0= Original Series Product Series 24=AC Cooling Capacity ISO 9001:2000 REGISTERED 24ABR3 As an Energy StarĀ® Partner, Carrier Corporation has determined that this product meets the ENERGY STARĀ® guidelines for energy efficiency. Refer to the combination ratings in Product Data for system combinations that meet Energy Star guidelines. STANDARD FEATURES Feature 13 SEER Scroll Compressor Wire Coil Guard Field Installed Filter Drier Front Seating Service Valves Internal Pressure Relief Valve Internal Thermal Overload Long Line capability Low Ambient capability with Kit 18 24 30 36 42 48 60 2 PHYSICAL DATA UNIT SIZE SERIES Operating Weight (lb) Shipping Weight (lb) Compressor Type REFRIGERANT Control Charge (lb) COND FAN Air Discharge Air Qty (CFM) Motor HP Motor RPM COND COIL Face Area (Sq ft) Fins per In. Rows Circuits VALVE CONNECT. (In. ID) Vapor Liquid REFRIGERANT TUBES